17．Some experts on adolescent psychology argue that violent movies are potential factors of juvenile crimes．

分析 一些青少年心理學(xué)專家認(rèn)為暴力電影是青少年犯罪的潛在因素．

解答 答案：potential
根據(jù)句意以及首字母的提示可知，此處的意思是：潛在的，由于此處用來修飾名詞factors，故填形容詞potential．

點(diǎn)評(píng) 做首字母填空題時(shí)，可根據(jù)句意以及首字母的提示判斷出空缺處的意思，從而確定出要填的單詞；然后從語(yǔ)法分析的角度，確定出應(yīng)填單詞的形式；因此在平時(shí)的學(xué)習(xí)中，除了應(yīng)牢固記憶單詞的拼寫之外，還要熟練掌握一些語(yǔ)法知識(shí)．

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